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When the center cleared the reporter to descend from FL330 to FL290 they did not descend. The reporter assumed the clearance was at pilot's discretion.
| Attributes | |
| ACN | 335517 |
| Time | |
| Date | 199605 |
| Day | Fri |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | atc facility : orf |
| State Reference | VA |
| Altitude | msl bound lower : 29000 msl bound upper : 33000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zdc |
| Operator | common carrier : air carrier |
| Make Model Name | Commercial Fixed Wing |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | Other Other |
| Flight Phase | cruise other |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 230 flight time total : 14500 flight time type : 8000 |
| ASRS Report | 335517 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : instrument pilot : commercial |
| Events | |
| Anomaly | non adherence : clearance |
| Independent Detector | other controllera |
| Resolutory Action | controller : issued new clearance other |
| Consequence | Other |
| Supplementary | |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | Pilot Deviation |
Narrative:
During cruise at FL330, controller gave us a clearance to FL290. Location was on J121 between iso and orf. We thought the clearance was at pilot's discretion so did not start down. Approximately 40 NM later, controller asked us about leaving FL330. Apparently it was not a discretionary descent, so we expedited down to FL290. The controller indicated that there weren't any conflicts.
Original NASA ASRS Text
Title: WHEN THE CTR CLRED THE RPTR TO DSND FROM FL330 TO FL290 THEY DID NOT DSND. THE RPTR ASSUMED THE CLRNC WAS AT PLT'S DISCRETION.
Narrative: DURING CRUISE AT FL330, CTLR GAVE US A CLRNC TO FL290. LOCATION WAS ON J121 BTWN ISO AND ORF. WE THOUGHT THE CLRNC WAS AT PLT'S DISCRETION SO DID NOT START DOWN. APPROX 40 NM LATER, CTLR ASKED US ABOUT LEAVING FL330. APPARENTLY IT WAS NOT A DISCRETIONARY DSCNT, SO WE EXPEDITED DOWN TO FL290. THE CTLR INDICATED THAT THERE WEREN'T ANY CONFLICTS.
Data retrieved from NASA's ASRS site as of July 2007 and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.